Funny the JRemote app is where I encounter many issues I have had with JRiver. Sometimes the album art is screwed up and sometimes I can't switch songs.
Interesting, my JRiver remote app works well, even better than Apple Remote (now uninstalled).
Apple Remote and Channel D were always crashing or stalling when I switched tracks or else "handshaking" had to be revisited to get it to play.
I HATED having to drag FLAC and WAV into Channel D so iTunes would play it. I choked Channel D a couple of times, dragging too many albums in for tagging at one time. Results were songs and art out of order and sometimes a completely different album would begin playing for no apparent reason.
I think album cover images load faster on JRiver via iPad too. For instance when you open the iPad and press the letter "S' it jumps to that page and all the albums that match load.
With Apple Remote there was a delay, almost as if the program was trying to fill in all the data between "A" and "S" before reaching that page.
I uninstalled Amarra, Channel D and cleaned out iTunes library and preferences before installing JRiver. I have all that backed up on a drive but I don't think I want to go back, unless the brightness thing cannot be resolved.
My 8TB drive is at a friends home for backup. When I get it back I'll go through the features again. I just started exploring this a week ago but spent nearly two years with Amarra and Channel D before JRiver.